Micromechanical Modeling of Anisotropy and Strain Rate Dependence of Short-Fiber-Reinforced Thermoplastics

The anisotropy and strain rate dependence of the mechanical response short-fiber-reinforced thermoplastics was studied using a straightforward micromechanical finite element analysis representative volume elements (RVEs). RVEs are created based on fiber orientation tensor, which quantifies processing-induced distribution. matrix is described by rate-dependent constitutive model (the Eindhoven glassy polymer (EGP) model), accurately captures intrinsic amorphous polymers. results indicate that influence loading direction yield stress multiplicatively decouplable, confirms previous experimental observations. Moreover, it demonstrated stress, to good approximation, can be directly linked in loading. This leads new relation uniquely links direction.